Reactive dyes
CA 1320191 C · Owner: Zeneca China Limited · Inventors: Yung, Chu Kwong; Phillips, Duncan Adrian Sidney; Taylor, John Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dd.33998, ABSTRACT, A water-soluble reactive dye of the formula: D1 - Z1 - NR1 - T - NR2 - Z2 _ D2 (1), wherein each of D1 and D2 independently, represents the radical of a water-soluble chromophoric compound, each of Z1 and Z2 independently, represents a triazine or pyrimidine residue carrying an atom or group imparting fibre-reactivity to the dye, R1 represents an optionally substituted alkyl radical R2 represents hydrogen or an optionally substituted alkyl radical, and, T represents a 1,3- or 1,4-phenylene radical which may carry one or more substituents selected from halogen alkyl, alkoxy, acylamino, nitro and carboxy.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.